"Caramelized onions and ooey-gooey Gruyere cheese brings all the flavors of French Onion Soup into a melt-in-your-mouth, juicy French Onion Patty Melt...."
INGREDIENTS
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3 tablespoons butter
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3 yellow onions, (sliced thin)
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2 pounds ground beef
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1 tablespoon ketchup
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½ teaspoon garlic powder
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1 teaspoon salt
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½ teaspoon pepper
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2 cups Gruyere cheese, (shredded)
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12 slices Texas toast
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8 teaspoons mayonnaise
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1/3 cup mayonnaise
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1 tablespoon lemon juice
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1 teaspoon pepper
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1 tablespoon (about 3 gloves) garlic, (minced)
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1 teaspoon fresh parsley
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1 tablespoon ketchup